Pipe1-1/4STD pipe

Detailing dimensions and section properties from the AISC Shapes Database, 16th Edition. Values are shown to the nearest 1/16 in. as they appear on a shop drawing.

Pipe1-1/4STD has a 1 11/16 in. outside diameter and a 1/8 in. nominal wall.

Also known as NPS 1-1/4 pipe (1-1/4 in. nominal), Schedule 40 (STD) wall.

At 2.27 lb per foot it is one of the 8 Pipe1 sizes, which run from 0.85 to 3.63 lb/ft.

For strong-axis bending its section modulus is Sx = 0.222 in³ and its moment of inertia Ix = 0.184 in⁴, with a plastic modulus Zx = 0.305 in³.

Detailing dimensions

Outside diameter1 11/16"
Nominal wall (t)1/8"

Section properties

Weight2.27 lb/ft
Area (A)0.625 in²
Ix0.184 in⁴
Sx0.222 in³
Zx0.305 in³
rx0.543 in
Iy0.184 in⁴
Sy0.222 in³
Zy0.305 in³
ry0.543 in
J0.368 in⁴

Other Pipe1 sizes

Same nominal size, different weight — useful when you are checking a substitution or a lighter section.

Pipe1/2STDPipe1/2XSPipe1STDPipe1XSPipe1-1/2STDPipe1-1/4XSPipe1-1/2XS

Similar weight pipe sizes

Comparable 2.27 lb/ft sections in other pipe sizes.

Pipe3/4XS1.48 lb/ft · Sx 0.0818 in³Pipe3/4STD1.13 lb/ft · Sx 0.0671 in³Pipe2STD3.66 lb/ft · Sx 0.528 in³Pipe2XS5.03 lb/ft · Sx 0.696 in³Pipe2-1/2STD5.8 lb/ft · Sx 1.01 in³Pipe3STD7.58 lb/ft · Sx 1.63 in³Pipe2-1/2XS7.67 lb/ft · Sx 1.27 in³Pipe2XXS9.04 lb/ft · Sx 1.07 in³

Detailing values are rounded to the nearest 1/16 in. per the AISC Steel Construction Manual. Verify critical dimensions against the current Manual before fabrication. Need Pipe1-1/4STD cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: Pipe · Steel Beam Size Chart

Interactive drawing